Ink-jet head
AssigneeBrother Kogyo Kabushiki Kaisha
InventorKoji Ito
Life of this patent
Estimating the term…
Abstract
An ink-jet head according to the present invention includes a wire member and a heat sink. The wire member has a substrate on a surface of which a driver IC chip is mounted. The heat sink is made of a metal material, in contact with the driver IC chip, and dissipates heat generated in the driver IC chip to outside. A first wire and a second wire are formed on the surface of the substrate of the wire member. The first and second wires are electrically connected to an individual electrode and a common electrode of a piezoelectric actuator, respectively. The second wire is formed along an outer edge of the substrate, and electrically connected and thermally coupled to the heat sink.
Claims6
An ink-jet head comprising:
- a passage unit having a pressure chamber that communicates with an ink ejection port;
- a piezoelectric actuator that applies pressure to ink in the pressure chamber, and has an individual electrode formed so as to be opposed to the pressure chamber, a common electrode formed so as to be opposed to the individual electrode, and a piezoelectric layer sandwiched between the individual electrode and the common electrode;
- a wire member having a substrate, a first wire that is formed on a surface of the substrate and electrically connected to the individual electrode, a second wire that is formed on the surface of the substrate and electrically connected to the common electrode, and a driver IC chip that is mounted on the surface of the substrate, gives a drive potential to the individual electrode through the first wire, and maintains the common electrode at a predetermined reference potential through the second wire;
- and
- a heat sink made of a metal material which is in contact with the driver IC chip and dissipates heat generated in the driver IC chip to outside,
- wherein the second wire is formed along an outer edge of the substrate, and electrically connected and thermally coupled to the heat sink.
Dependencies are inferred from the claim text.